//
// Copyright (c) PlaceholderCompany. All rights reserved.
//
namespace SystemTrayMenu.Helper
{
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
///
/// Provides helper methods for imaging.
///
public static class ImagingHelper
{
///
/// Converts a PNG image to a icon (ico).
///
/// The input stream.
/// The output stream.
/// The size (16x16 px by default).
/// Preserve the aspect ratio.
/// Wether or not the icon was succesfully generated.
public static bool ConvertToIcon(Stream input, Stream output, int size = 16, bool preserveAspectRatio = false)
{
Bitmap inputBitmap = (Bitmap)Image.FromStream(input);
if (inputBitmap != null)
{
int width, height;
if (preserveAspectRatio)
{
width = size;
height = inputBitmap.Height / inputBitmap.Width * size;
}
else
{
width = height = size;
}
Bitmap newBitmap = new(inputBitmap, new Size(width, height));
if (newBitmap != null)
{
// save the resized png into a memory stream for future use
using MemoryStream memoryStream = new();
newBitmap.Save(memoryStream, ImageFormat.Png);
BinaryWriter iconWriter = new(output);
if (output != null && iconWriter != null)
{
// 0-1 reserved, 0
iconWriter.Write((byte)0);
iconWriter.Write((byte)0);
// 2-3 image type, 1 = icon, 2 = cursor
iconWriter.Write((short)1);
// 4-5 number of images
iconWriter.Write((short)1);
// image entry 1
// 0 image width
iconWriter.Write((byte)width);
// 1 image height
iconWriter.Write((byte)height);
// 2 number of colors
iconWriter.Write((byte)0);
// 3 reserved
iconWriter.Write((byte)0);
// 4-5 color planes
iconWriter.Write((short)0);
// 6-7 bits per pixel
iconWriter.Write((short)32);
// 8-11 size of image data
iconWriter.Write((int)memoryStream.Length);
// 12-15 offset of image data
iconWriter.Write(6 + 16);
// write image data
// png data must contain the whole png data file
iconWriter.Write(memoryStream.ToArray());
iconWriter.Flush();
return true;
}
}
return false;
}
return false;
}
///
/// Converts a PNG image to a icon (ico).
///
/// The input path.
/// The output path.
/// The size (16x16 px by default).
/// Preserve the aspect ratio.
/// Wether or not the icon was succesfully generated.
public static bool ConvertToIcon(string inputPath, string outputPath, int size = 16, bool preserveAspectRatio = false)
{
using FileStream inputStream = new(inputPath, FileMode.Open);
using FileStream outputStream = new(outputPath, FileMode.OpenOrCreate);
return ConvertToIcon(inputStream, outputStream, size, preserveAspectRatio);
}
}
}